Vari+San Insole Lined Hydrogel Size 4 (43/44) 2 pcs is a lined insole with hydrogel. This time, these insoles belong to size 4, equivalent to size 42/44 of normal footwear. They help protect the foot and prevent pain and aches when walking. The hydrogel, on the other hand, is a hypoallergenic and odorless product, with which the feet will enjoy an intense protection against the creation of moisturizing particles that can cause the annoying foot odor.